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dc.contributor.authorLi, Peng
dc.contributor.authorXia, Chuan
dc.contributor.authorZheng, Dongxing
dc.contributor.authorWang, Ping
dc.contributor.authorJin, Chao
dc.contributor.authorBai, Haili
dc.date.accessioned2016-02-28T09:48:51Z
dc.date.available2016-02-28T09:48:51Z
dc.date.issued2015-12-10
dc.identifier.citationObservation of large low-field magnetoresistance in spinel cobaltite: A new half-metal 2016, 10 (2):190 physica status solidi (RRL) - Rapid Research Letters
dc.identifier.issn18626254
dc.identifier.doi10.1002/pssr.201510402
dc.identifier.urihttp://hdl.handle.net/10754/600278
dc.description.abstractLow-field magnetoresistance is an effective and energy-saving way to use half-metallic materials in magnetic reading heads and magnetic random access memory. Common spin-polarized materials with low field magnetoresistance effect are perovskite-type manganese, cobalt, and molybdenum oxides. In this study, we report a new type of spinel cobaltite materials, self-assembled nanocrystalline NiCo2O4, which shows large low field magnetoresistance as large as –19.1% at 0.5 T and –50% at 9 T (2 K). The large low field magnetoresistance is attributed to the fast magnetization rotation of the core nanocrystals. The surface spin-glass is responsible for the observed weak saturation of magnetoresistance under high fields. Our calculation demonstrates that the half-metallicity of NiCo2O4 comes from the hopping eg electrons within the tetrahedral Co-atoms and the octahedral Ni-atoms. The discovery of large low-field magnetoresistance in simple spinel oxide NiCo2O4, a non-perovskite oxide, leads to an extended family of low-field magnetoresistance materials. (© 2016 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim)
dc.description.sponsorshipThis work was supported by National Natural Science Foundation of China (Grant No. 11204207) and Ph.D. Programs Foundation of Ministry of Education of the People’s Republic of China (Grant No. 20120032120074).
dc.language.isoen
dc.publisherWiley
dc.relation.urlhttp://doi.wiley.com/10.1002/pssr.201510402
dc.rightsThis is the peer reviewed version of the following article: Li, P., Xia, C., Zheng, D., Wang, P., Jin, C. and Bai, H. (2016), Observation of large low-field magnetoresistance in spinel cobaltite: A new half-metal. Phys. Status Solidi RRL, 10: 190–196., which has been published in final form at http://doi.wiley.com/10.1002/pssr.201510402. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
dc.subjectspinel oxides
dc.subjectNiCo2O4
dc.subjectmagnetoresistance
dc.subjecthalf metals
dc.subjectnanocrystals
dc.subjectmagnetization
dc.subjectdensity of states
dc.titleObservation of large low-field magnetoresistance in spinel cobaltite: A new half-metal
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalphysica status solidi (RRL) - Rapid Research Letters
dc.eprint.versionPost-print
dc.contributor.institutionTianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Institute of Advanced Materials Physics, Faculty of Science, Tianjin University; Tianjin 300072 P. R. China
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personXia, Chuan
refterms.dateFOA2016-12-10T00:00:00Z
dc.date.published-online2015-12-10
dc.date.published-print2016-02


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